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Multi-wavelength 128 Gbit s^{−1} λ^{−1} PAM4 optical transmission enabled by a 100 GHz quantum dot mode-locked optical frequency comb

Pan, S; Zhang, H; Liu, Z; Liao, M; Tang, M; Wu, D; Hu, X; ... Chen, S; + view all (2022) Multi-wavelength 128 Gbit s^{−1} λ^{−1} PAM4 optical transmission enabled by a 100 GHz quantum dot mode-locked optical frequency comb. Journal of Physics D: Applied Physics , 55 (14) , Article 144001. 10.1088/1361-6463/ac4365. Green open access

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Abstract

Semiconductor mode-locked lasers (MLLs) with extremely high repetition rates are promising optical frequency comb (OFC) sources for their usage as compact, high-efficiency, and low-cost light sources in high-speed dense wavelength-division multiplexing transmissions. The fully exploited conventional C- and L- bands require the research on O-band to fulfil the transmission capacity of the current photonic networks. In this work, we present a passive two-section InAs/InGaAs quantum-dot (QD) MLL-based OFC with a fundamental repetition rate of ∼100 GHz operating at O-band wavelength range. The specially designed device favours the generation of nearly Fourier-transform-limited pulses in the entire test range by only pumping the gain section while with the absorber unbiased. The typical integrated relative intensity noise of the whole spectrum and a single tone are −152 and −137 dB Hz^{−1} in the range of 100 MHz–10 GHz, respectively. Back-to-back data transmissions for seven selected tones have been realised by employing a 64 Gbaud four-level pulse amplitude modulation format. The demonstrated performance shows the feasibility of the InAs QD MLLs as a simple structure, easy operation, and low power consumption OFC sources for high-speed fibre-optic communications.

Type: Article
Title: Multi-wavelength 128 Gbit s^{−1} λ^{−1} PAM4 optical transmission enabled by a 100 GHz quantum dot mode-locked optical frequency comb
Open access status: An open access version is available from UCL Discovery
DOI: 10.1088/1361-6463/ac4365
Publisher version: https://doi.org/10.1088/1361-6463%2Fac4365
Language: English
Additional information: © 2022 IOP Publishing. Original content from this work may be used under the terms of the Creative Commons Attribution 4.0 license (http://creativecommons.org/licenses/by/4.0/).
UCL classification: UCL
UCL > Provost and Vice Provost Offices > UCL BEAMS
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science > Dept of Electronic and Electrical Eng
URI: https://discovery.ucl.ac.uk/id/eprint/10141268
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